Group of 20 summit in Russia

Heads of state attend the second working session at the G20 summit in St. Petersburg.   (Dimitar Dilkoff / AFP/Getty Images)

President Obama speaks during a press conference at the end of the G20 summit in St. Petersburg, Russia.   (Handout / Getty Images)

Scene from the news conference on the outcome of the G20 summit. Leaders of the G20 nations made progress on tightening up on multinational company tax avoidance, but remain divided over the Syrian conflict on the final day of the summit in Russia.   (Handout / Getty Images)

Russia’s President Vladimir Putin, center, walks past other heads of state and international organization leaders as he arrives for the family photo at the G20 summit.  (Kirill Kudryavtsev / AFP/Getty Images)

Russias President Vladimir Putin during a press conference at the end of the G20 summit.  (Alexander Nemenov / AFP/Getty Images)

Saudi Arabia’s Minister of Finance Ibrahim bin Abdulaziz Al-Assaf prepares to shake hands at the start of the G20 summit in St. Petersburg.   (Yuri Kadobnov / AFP/Getty Images)

Russian President Vladimir Putin welcomes U.S. President Obama at the start of the G20 summit. Russia hopes to push forward an agenda to stimulate growth but world leaders are distracted by divisions on the prospect of U.S.-led military action in Syria.   ( AFP/Getty Images)

Aerial photo of Constantine Palace, which is playing host to the Group of 20 summit in St. Petersburg, Russia.  (Guneev Sergey / AFP/Getty Images)

Russia’s President Vladimir Putin, left, speaks with Mexico’s President Enrique Pena Nieto during arrivals for the G20 summit at the Constantine Palace in St. Petersburg.   (Alexander Zemlianichenko / Associated Press)

A member of the Russian United Labour Front holds a poster as she pickets outside the Europe Hotel, where visiting U.S. President Obama will stay during the G20 summit in St.Petersburg.  (Elena Ignatyeva / Associated Press)